From here with modifications, https://www.digitalocean.com/community/questions/no-internet-connection-after-droplet-reboot
- Open DO droplet control panel, open networking, save publicipv4, gateway, netmask
- Open Access in control panel, open recovery console
- Check active network adapter with this command
ip link ls up
if eth0/eth1 not showing, continue
- Get mac address in here